Solar cell



FIG. 1 is a front perspective view of a solar cell showing our new design;

FIG. 2 is a top view thereof,

FIG. 3 is a right side view, the left side being a mirror image thereof,

FIG. 4 is a front view, the rear view being a mirror image thereof,

FIG. 5 is a front perspective view of an alternate embodiment of a solar cell showing our new design;

FIG. 6 is a top view thereof,

FIG. 7 is a right side view thereof, the left side being a mirror image thereof; and,

FIG. 8 is a front view thereof, the rear view being a mirror image thereof. 

We claim the ornamental design for a solar cell, as shown and described. 